Spring-hinge.



No. 733,153. PATENTED JULY 7, 1903. K. V. CLARK.

SPRING HINGE.

AI'PLIOATION FILED MAR. 28- 1903.

H0 MODEL.

UNITED STATES Patented July '7, 1903.

'KIMBALL V. CLARK, OF BUFFALO, NEW YORK.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 7 33,153, dated July 7, 1903.

Application filed March 28, 1903. Serial No.'l50,028. (N0 model.)

T0 whom it may concern.-

Be it known that I, KIMBALL V. CLARK, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and usefullmprovements in Spring-Hinges, of which the following is a specification.

This invention relates to spring-hinges, and more especially to such hinges designed for use in connection with screen-doors; and it has for its object to provide a hinge of the character described which shall be simple and durable in construction, efficient in operation, and which may be manufactured at small cost.

To these ends myinvention consists in the features and in the construction, combination, and arrangement of parts hereinafter described, and particularly pointed out in the claim following the description, reference being had to the accompanying drawings, forming a part of this specification, and wherein Figure 1 is a front elevation of my improved hinge. Fig. 2 is a top plan view thereof. Fig. 3 is a horizontal sectional view taken on the line 3 3 of Fig. 1. Fig. 4 is a horizontal sectional View showing the parts in position to assemble or separate the two leaves of the hinge. Fig. 5 is a perspective View of one of the leaves.

Referring to the drawings, the numerals 1 and 2 indicate the two leaves of the hinge, each comprising a fiat base 3, provided with screw-holes l, through which pass the screws which are employed for attaching the two leaves to the door and door-frame, respectively. The central screw-hole at of each leaf is extended inwardly a short distance and bridged at its inner end by a transverse bridge 5, which is circumferentially and centrally grooved, as at 6. One leaf is the exact duplicate of the other, and hence it will only be necessary to explain the construction of one of them, as the leaf 1.

The leaf 1 is provided near its inner ends with inwardly-extendingwings or arms 7 and S, which also project at an angle to the leaf, as shown. The arm 7 has cast therewith a Vertical and downwardly-extending pivotpin 9, provided with a laterally-projecting lug 10. The other arm 8 has cast on its end an open eye 11, the numeral 12 indicating the opening, and said eye has cast-on its upper side a flange or sleeve 13, which extends about the open eye. On the under side of the arm 8, adjacentto the eye 11, is cast a shoulder 14, preferably having a rounded or camshaped edge 15, said shoulder being termed by me a back-stop. Formed about the lower edge of the eye ll is a circumferential flange 16, in the periphery or which is formed a notch or recess 17. A

As before stated, the two leaves are duplicates one of the other; but when assembled together they are reversely arranged-that is to say, the upper end of one leaf corresponds or is adjacent to the lower end of the other leaf. In assembling the two leaves together the pivot-pin 9 of one leaf is inserted in the eye of the other leaf, the lug 10 of each pivotpin resting on the inner side of the eye 11 of the other leaf.

A coil-spring l8 is provided, the outer ends 19 of which are bent to form hooks, which are hooked about the circumferential grooved portions of the bridges 5. The spring holds the two leaves together and lies practically in the same plane as the two leaves, whereby it is protected. When the hinge is flexed,as by opening the door, for example, the spring is expanded, and when the door is released the spring contracts, thus drawing the door to its closed position. During the closing operation as the two leaves approach the same vertical plane the back-stops 14 abut the edges of the corresponding arms, thus arresting the movement of the hinges and holding the leaves in alinement. As the leaves are turned relatively to one another the lugs 10 ride around the inner or adjacent sides of the eyes 11, and at the same time the circumferential flanges 16 of the eyes 11 ride between the adjacent or inner sides of the arms 7 and projections 20, formed on said I arms and extending toward the lugs 10,Whereby any accidental separation of the two lugs is rendered impossible. To assemble or separate the two leaves, they are turned until the notches or recesses 17 are in alinement with the projections 20, at which time by lifting the leaf 1 the two leaves can be readily disengaged after unhooking one end of' the spring. It will be noted that at no time will the lugs of the pivot-pins register with the openings in the eyes, and said openings are formed to render the employment of cores unnecessary in the operation of casting.

Having thus described my invention, What I claim is A spring-hinge comprising two duplicate leaves, each having twooutwardly-projecting arms, one of said arms of each leaf being provided with a vertical and inwardly-projecting pin having on its end a laterally-projecting lug, and the other arm terminating in an eye, the pin of one leaf being rotatably fitted in the eye of the other leaf, and the lug on each of said pins engaging and riding on the corresponding eye, and circumferential flanges formed on the outer edge of each of the eyes and having formed therein a notch, said flanges riding between the arms of the adjacent leaves, and shoulders formed on said leaves, substantially as described and for the purpose specified. y

In testimony whereof I have hereunto set my'hand in presence of two subscribing witnesses.

KIMBALL V. CLARK. Witnesses:

FRANK J. TANNER, MARGARET B. EGGLESTON. 

